PoS - Proceedings of Science
Volume 256 - 34th annual International Symposium on Lattice Field Theory (LATTICE2016) - Poster Session
Charmed pseudoscalar decay constants on three-flavour CLS ensembles with open boundaries
S. Hofmann*, S. Collins, K. Eckert, J. Heitger, W. Söldner and  RQCD and ALPHA Collaborations
Full text: pdf
Pre-published on: February 13, 2017
Published on: March 24, 2017
We determine the masses and pseudoscalar decay constants of D and
$\mathrm{D}_\mathrm{s}$ mesons employing lattice QCD with
non-perturbatively ${\cal O}(a)$ improved Wilson quarks and a tree-level
Symanzik-improved gauge action.
Our analysis is based on the large-volume $\nf=2+1$ ensembles using open
boundary conditions, generated within the CLS effort.
The status of results presented here covers two lattice spacings,
$a\approx 0.0854$ fm and $a\approx 0.0644$ fm, and pion masses varied from
420 to 200 MeV.
We also report on our implementation of distance
preconditioning for the calculation of heavy quark propagators and discuss
the impact of the resulting accuracy improvements on the extraction of charmed
meson masses and decay constants.
This is part of a continuing analysis by the RQCD and ALPHA Collaborations,
aiming at a stable continuum extrapolation using several lattice spacings.
To extrapolate to the physical masses, we follow both,
the \mbox{$(2\ml+\ms)=\mathrm{const.}$} and the $\ms=\mathrm{const.}$ line in
parameter space.
DOI: https://doi.org/10.22323/1.256.0368
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